Ignore "allcaptures" after DFA matching.

ChangeLog

@@ -170,6 +170,8 @@ large stack size when testing with clang.
 
 43. Detect integer overflow in pcre2test pattern and data repetition counts.
 
+44. In pcre2test, ignore "allcaptures" after DFA matching.
+
 
 Version 10.21 12-January-2016
 -----------------------------

doc/pcre2test.1

@@ -1,4 +1,4 @@
-.TH PCRE2TEST 1 "17 June 2016" "PCRE 10.22"
+.TH PCRE2TEST 1 "06 July 2016" "PCRE 10.22"
 .SH NAME
 pcre2test - a program for testing Perl-compatible regular expressions.
 .SH SYNOPSIS
@@ -1055,7 +1055,8 @@ The \fBallcaptures\fP modifier requests that the values of all potential
 captured parentheses be output after a match. By default, only those up to the
 highest one actually used in the match are output (corresponding to the return
 code from \fBpcre2_match()\fP). Groups that did not take part in the match
-are output as "<unset>".
+are output as "<unset>". This modifier is not relevant for DFA matching (which 
+does no capturing); it is ignored, with a warning message, if present.
 .
 .
 .SS "Testing callouts"
@@ -1681,6 +1682,6 @@ Cambridge, England.
 .rs
 .sp
 .nf
-Last updated: 17 June 2016
+Last updated: 06 July 2016
 Copyright (c) 1997-2016 University of Cambridge.
 .fi

src/pcre2test.c

@@ -6436,15 +6436,23 @@ else for (gmatched = 0;; gmatched++)
 
     /* "allcaptures" requests showing of all captures in the pattern, to check
     unset ones at the end. It may be set on the pattern or the data. Implement
-    by setting capcount to the maximum. */
+    by setting capcount to the maximum. This is not relevant for DFA matching,
+    so ignore it. */
 
     if ((dat_datctl.control & CTL_ALLCAPTURES) != 0)
       {
       uint32_t maxcapcount;
-      if (pattern_info(PCRE2_INFO_CAPTURECOUNT, &maxcapcount, FALSE) < 0)
-        return PR_SKIP;
-      capcount = maxcapcount + 1;   /* Allow for full match */
-      if (capcount > (int)oveccount) capcount = oveccount;
+      if ((dat_datctl.control & CTL_DFA) != 0)
+        {
+        fprintf(outfile, "** Ignored after DFA matching: allcaptures\n");
+        }
+      else
+        {
+        if (pattern_info(PCRE2_INFO_CAPTURECOUNT, &maxcapcount, FALSE) < 0)
+          return PR_SKIP;
+        capcount = maxcapcount + 1;   /* Allow for full match */
+        if (capcount > (int)oveccount) capcount = oveccount;
+        }
       }
 
     /* Output the captured substrings. Note that, for the matched string,

testdata/testinput6

@@ -4878,4 +4878,8 @@
 /abcd/null_context
     abcd\=null_context
 
+/()()a+/no_auto_possess
+    aaa\=dfa,allcaptures
+    a\=dfa,allcaptures
+
 # End of testinput6

testdata/testoutput6

@@ -7672,4 +7672,14 @@ No match
     abcd\=null_context
  0: abcd
 
+/()()a+/no_auto_possess
+    aaa\=dfa,allcaptures
+** Ignored after DFA matching: allcaptures
+ 0: aaa
+ 1: aa
+ 2: a
+    a\=dfa,allcaptures
+** Ignored after DFA matching: allcaptures
+ 0: a
+
 # End of testinput6